postmortem

Facilitate blameless postmortem analysis with 5 Whys and fishbone diagrams.

276|46|Updated Jan 16, 2026
One-click install
npx skills add https://github.com/nicepkg/ai-workflow --skill postmortem-nicepkg
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: postmortem
Source: https://github.com/nicepkg/ai-workflow/tree/main/workflows/product-manager-workflow/.claude/skills/postmortem
Command: npx skills add https://github.com/nicepkg/ai-workflow --skill postmortem-nicepkg

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps you conduct thorough, blameless postmortems to understand the root causes of failures, document lessons learned, and implement corrective actions, ultimately improving system reliability and organizational learning.

Core Features & Use Cases

  • Structured Analysis: Guides you through documenting incidents, analyzing root causes (e.g., 5 Whys, fishbone diagrams), and identifying actionable prevention strategies.
  • Blameless Culture: Promotes a culture of transparency and learning by focusing on systems and processes rather than individual blame.
  • Use Case: After a production outage, use this Skill to systematically document what happened, why it happened, its impact, and create a clear plan with owners and deadlines to prevent it from happening again.

Quick Start

Use the postmortem skill to analyze the recent database outage and document the root cause and corrective actions.

Frequently Asked Questions about postmortem

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I conduct a blameless postmortem analysis after a production outage?

Conduct a blameless postmortem by documenting the incident impact, analyzing the root cause using techniques like 5 Whys, and defining actionable preventive measures with specific owners and deadlines to improve system reliability.

What is the best way to find the root cause of a system failure without assigning individual blame?

The best way to find the root cause without blame is to apply a blameless culture, focusing strictly on systemic flaws and process gaps rather than individual mistakes, using structured root cause analysis frameworks like fishbone diagrams.

How does 5 Whys root cause analysis work for incident documentation?

5 Whys root cause analysis works by sequentially asking "why" an incident occurred until the fundamental systemic failure is uncovered, facilitating organizational learning and informing the corrective actions documented in the postmortem.

Can I use fishbone diagrams for structured root cause analysis of software outages?

Yes, you can use fishbone diagrams for structured root cause analysis of software outages. This technique helps visually map out contributing factors across various categories, ensuring comprehensive incident documentation and effective lessons learned.

When do I need to document lessons learned from an incident or negative outcome?

You need to document lessons learned from an incident immediately after resolving a failure or negative outcome. This structured documentation captures the root cause and defines preventive measures, which is essential for preventing recurrence and improving reliability.

How do I define actionable preventive measures with owners and timelines after a failure?

Define actionable preventive measures by identifying specific corrective actions during the postmortem, assigning a clear owner responsible for each task, and establishing strict deadlines to ensure the systemic issues causing the failure are resolved.